PAIREF provides a graphical interface to make an execution of calculations easier. It can be launched in the terminal (GNU/Linux, macOS) or CCP4 console (Windows) running command:
ccp4-python -m pairef --gui
If you got an error message
No module named pairef, check whether PAIREF is properly installed in CCP4 environment - read the section PAIREF works with PHENIX but not with CCP4 including PAIREF GUI.
If you have installed PAIREF as root or you added the user site-packages directory in your shell PATH, simply execute only
The user interface depens on PyQt4. This framework is available in the CCP4 Software Suite - not in PHENIX.